Infrared port for a computer. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Infrared port for a computer. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / infrared technology

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Infrared port for a computer. IR communication

Everything is extremely simple and clear. I used to connect my computer and laptop so as not to suffer with wires. Although it also looks like a null modem connection. If you connect this circuit to a connector on your computer's motherboard, then Windows9x will find and install it without any problems.

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Neural compass in the brain 22.08.2019

Researchers from the University of Texas at Austin and the Massachusetts Institute of Technology recorded the activity of multiple anterodorsal nucleus neurons in a mouse's brain while the mouse itself ran free. The work of those neurons that responded to head turns was then analyzed using topological methods.

Several thousand of these cells form a curved annular structure. (A similar ring was previously discovered in the Drosophila brain.) This ring converts heterogeneous information that enters the brain from the outside into information about which direction the head is in - turning the head corresponds to turning on neurons in one or another segment of the ring. Moreover, if a neuron makes a mistake, its neighbors will correct it, that is, the activity of nerve cells is attracted to a certain trajectory, as in mathematical attractors.

Even in a dream, when the neurons are almost disconnected from the outside world, the "compass" ring still worked - most likely because even in a dream the head is still directed somewhere, and the compass still feels this direction. True, in a dream, the shape and size of the ring changed - a different number of cells analyzed the position of the head, and relied on information of a different kind than during wakefulness.

In this case, it is important not only that they managed to discover the "compass", but also that the researchers for the first time managed to see a neural system that converts a lot of concrete facts into fairly abstract information - how the abstract direction of the head is obtained from specific stimuli acting on the senses . It is possible that other cognitive processes based on generalizations are carried out in similar neural structures, which, however, can have very different forms.

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